Thin Adhesive Tape for Battery Insulation and Fixability
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Solution Overview
Problem
Thinned adhesive tapes used in batteries often fail to maintain a stable fixed state on the affixed surface, leading to potential peeling off and reduced insulation and safety issues, particularly due to a lack of balance between fixability and followability to deformed members.
Innovation Solution
The adhesive tape is designed with a base thickness of 2 to 25 μm and an adhesive layer thickness of 0.1 to 10 μm, achieving a balance between fixability and followability by adjusting peel adhesion and strength to repel members within specific ranges, ensuring sufficient adhesion and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the adhesive tape is thinned to contribute to battery miniaturization, then the volume and weight are reduced, but the fixability and reliability deteriorate causing peeling off
Solution Approach 1:
The invention changes the physical parameters of the adhesive tape by precisely controlling the base film thickness (2-25 μm) and adhesive layer thickness (0.1-10 μm) to achieve optimal balance between thinness and reliability. This parameter optimization allows the tape to be thin enough for miniaturization while maintaining sufficient adhesion strength to prevent peeling
Solution Approach 2:
The invention uses a composite structure consisting of a base film and an adhesive layer with specific material properties. The base film provides mechanical strength while the adhesive layer provides bonding capability, creating a composite material system that achieves both thinness and reliability through synergistic material combination
2Volume of moving object
If the adhesive tape is thinned to contribute to battery miniaturization, then the volume and weight are reduced, but the insulation performance deteriorates
Solution Approach 1:
The invention optimizes the base film thickness parameter (2-25 μm) to maintain adequate insulation performance while minimizing thickness. The base film material and thickness are carefully selected to provide sufficient electrical insulation for battery applications despite the reduced overall tape thickness
3Strength
If the adhesive layer thickness is increased to improve fixability, then the adhesion strength is improved, but the followability to deformed members deteriorates
Solution Approach 1:
The invention precisely controls the adhesive layer thickness parameter (0.1-10 μm) to achieve optimal balance between peel adhesion and followability. This parameter optimization ensures the adhesive layer is thick enough to provide sufficient bonding strength while remaining thin and flexible enough to conform to deformed battery components during assembly and operation
Data Source
AI summary
A thin adhesive tape includes a base and an adhesive layer provided on one surface of the base, wherein the base has a thickness of 2 to 25 μm, the adhesive layer has a thickness of 0.1 to 10 μm, the adhesive tape has a thickness of 30 μm or less, the adhesive tape has a peel adhesion of 0.50 N/10 mm or more in accordance with JIS Z 0237:2000, and the adhesive tape has a strength to repel members calculated by the following formula of 70 MPa·mm or less, the adhesive tape being excellent in a balance between fixability of members and followability to members:Strength to repel members (MPa·mm)=tensile elastic modulus (MPa) of adhesive tape×thickness (mm) of adhesive tape.